I think a good portion of those 450 people, including him, will laugh at your pathetic attempts to raise your self-worth by attempting to bring another's down. Also at the fact that he still clearly controls you and your behavior.
if he really is a sociopath i think that may do little to 'freak him out'. also, he can play this one off as you being the crazy harassing type. be smart, don't be a retard. just steal his passport or punch him in the face while he's incapacitated
I don't see anything wrong with the plan actually...I just wait a couple of months, he wouldn't even suspect me anymore. Nobody knows it is me, so it's only him being exposed to his circle of people..